After building the wall (fence) around your wall, a wise player will start to build a town hall, and if this exists already, he can try to strengthen it the more. Then, try to upgrade your defensive means and structures such as the archer towers, mortar, and air defense. You can ensure your defensive structures especially the air defense and mortal are close to the center of your empire when implementing hack clash of clans while low building can be left even outside of the fence.